- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT06661564
Identifizierung von Diagnose-Biomarkern in den Tränen von Alzheimer-Patienten: die COG-EYE-Pilotstudie (COG-EYE)
Identification De Biomarqueurs Diagnostiques Dans Les Larmes De Patients Atteints De Maladie D'Alzheimer: L'étude Pilote COG-EYE
The diagnosis of Alzheimer's disease (AD) relies on the detection of protein biomarkers, particularly in cerebrospinal fluid (e.g., Aβ and phosphorylated Tau) or through brain imaging. The invasive nature of lumbar puncture and the numerous contraindications have driven the search for early and reliable diagnostic biomarkers for AD.
Human tears are an accessible biological fluid that has proven relevant in the biomarker search strategy for both ophthalmological and systemic diseases, especially neurodegenerative conditions. Advances in methods for low-volume analysis have facilitated the identification of tear biomarkers. Total tau has been reported as elevated in the tears of patients with AD compared to controls (n=65). Additionally, metabo-lipidomic analyses offer several advantages (accessibility, non-invasiveness, reproducibility) and also appear promising as a diagnostic tool for systemic and neurodegenerative diseases, such as amyotrophic lateral sclerosis. This supports the relevance of comparing both AD proteins biomarkers and metabo-lipidomic signatures in the tears of patients with AD (Mild Cognitive Impairement (MCI) and dementia) with healthy controls.
Studienübersicht
Status
Bedingungen
Studientyp
Einschreibung (Geschätzt)
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
- Name: Victoire LEROY, MD
- Telefonnummer: 0247477693
- E-Mail: victoire.leroy@univ-tours.fr
Studieren Sie die Kontaktsicherung
- Name: Raoul Kanav KHANNA, MD, PhD
- E-Mail: raoul.khanna@univ-tours.fr
Studienorte
-
-
France
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Tours, France, Frankreich, 37044
- Rekrutierung
- CHRU de Tours
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Hauptermittler:
- Victoire LEROY, MD
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Kontakt:
- Victoire LEROY
- Telefonnummer: +332 47 47 76 93
- E-Mail: victoire.leroy@univ-tours.fr
-
Kontakt:
- Coralie TAILLEBUIS
- Telefonnummer: +332 47 47 39 09
- E-Mail: cpcq@chu-tours.fr
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-
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Age ≥18 years
- Participant affiliated in French Social Security scheme
- Informed and written consent from the participant
Exclusion Criteria:
- Pregnant or breastfeeding woman
- Participant under judicial protection measures
- Participant under guardianship or curatorship
- Contraindications to participation in the research:
Other neurodegenerative disease Any eye drops or treatment that may interfere with tear production Occasional or permanent contact lens use within the last 3 months Eye surgery ≤3 months Any ocular pathology other than refractive errors, oculomotor disorders, amblyopia Any general pathology other than AD with ocular implications
-Inability to perform tear collection
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Diagnose
- Zuteilung: Nicht randomisiert
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Keine (Offenes Etikett)
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
|---|---|
|
Aktiver Komparator: Patients with AD dementia
Patient ≥ 18 years old with AD at a major stage according to the 2018 NIA-AA criteria (dementia) |
Collection of a tear volume of (i) 2 x 5µL using glass microcapillary tubes and (ii) 12µL using Schirmer strips after the instillation of anesthetic eye drops for metabo-lipidomic analysis and multiplexing of protein markers |
|
Aktiver Komparator: Patients with AD Mild Cognitive Impaiment (MCI)
Patient ≥ 18 years old with AD at a minor stage according to the 2018 NIA-AA criteria (Mild Cognitive Impairment) |
Collection of a tear volume of (i) 2 x 5µL using glass microcapillary tubes and (ii) 12µL using Schirmer strips after the instillation of anesthetic eye drops for metabo-lipidomic analysis and multiplexing of protein markers Collection of a blood sample (5 mL) for blood biomarkers analysis. |
|
Schein-Komparator: Healthy controls
Participants ≥ 18 years old with no known central neurological pathology, no cognitive decline, and matched by age (± 2 years) and sex with a patient from AD-MCI group |
Collection of a tear volume of (i) 2 x 5µL using glass microcapillary tubes and (ii) 12µL using Schirmer strips after the instillation of anesthetic eye drops for metabo-lipidomic analysis and multiplexing of protein markers |
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Concentration of total Tau proteins in basal tears of patients with AD vs healthy volunteers
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of phosphorylated Tau proteins in basal tears of patients with AD vs healthy volunteers
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-40 proteins in basal tears of patients with AD vs healthy volunteers
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-42 in basal tears of patients with AD vs healthy volunteers
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Lipids in basal tears of patients with AD vs healthy volunteers
Zeitfenster: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Lipids in tears of patients with AD vs healthy volunteers |
At inclusion
|
|
Metabolites in basal tears of patients with AD vs healthy volunteers
Zeitfenster: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Metabolites in tears of patients with AD vs healthy volunteers |
At inclusion
|
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Concentration of total Tau proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of phosphylated Tau proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Zeitfenster: A inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
A inclusion
|
|
Concentration of Amyloid β 1-40 proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Zeitfenster: A inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
A inclusion
|
|
Concentration of Amyloid β 1-42 proteins in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Zeitfenster: A inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
A inclusion
|
|
Lipids in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Zeitfenster: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of lipids in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
|
Metabolites in tears vs plasma and Cerebral spinal fluid (CSF) within patients with AD-MCI
Zeitfenster: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of metabolites in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
|
Concentration of total Tau proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of phosphorylated Tau proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-40 proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Concentration of Amyloid β 1-42 proteins in basal tears of patients with AD-dementia vs patients with AD-MCI
Zeitfenster: At inclusion
|
12μL of tears will be collected using Schirmer strips after instillation of an anaesthetic eye drop. A multiplex analysis for the detection of protein of interest |
At inclusion
|
|
Lipids in basal tears of patients with AD-dementia vs patients with AD-MCI
Zeitfenster: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of lipids in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
|
Metabolites in basal tears of patients with AD-dementia vs patients with AD-MCI
Zeitfenster: At inclusion
|
Collection of tears (5μL) using a glass micropipette without local anaesthetic. Identification of metabolites in basal tears using liquid chromatography-mass spectrometry. |
At inclusion
|
Mitarbeiter und Ermittler
Sponsor
Ermittler
- Studienleiter: Victoire LEROY, MD, CHRU de Tours
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Primärer Abschluss (Geschätzt)
Studienabschluss (Geschätzt)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Erkrankungen des Gehirns
- Erkrankungen des zentralen Nervensystems
- Erkrankungen des Nervensystems
- Psychische Störungen
- Wunden und Verletzungen
- Neurokognitive Störungen
- Demenz
- Tauopathien
- Neurodegenerative Krankheiten
- Alzheimer Erkrankung
- Schnittwunden
- Aminosäuren, Peptide und Proteine
- Nervengewebeproteine
- Proteine
- Mikrotubuli -Proteine
- Zytoskelettproteine
- Mikrotubuli-assoziierte Proteine
- Tau-Proteine
Andere Studien-ID-Nummern
- DR240140
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Beschreibung des IPD-Plans
Qualified researchers may obtain access to all deidentified data in COG-EYE on a substantial request.
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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